printk %pF %pS含义【转】

本文介绍了内核中符号和函数指针的打印方法,包括使用'S'、's'、'B'、'F'及'f'等格式符的具体应用场景与效果。特别讨论了在不同编译器优化级别下如何准确地获取函数地址。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

作者:啐楼
链接:https://www.zhihu.com/question/37769890/answer/73532192
来源:知乎
著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。

Symbols/Function Pointers:
%pF versatile_init+0x0/0x110
%pf versatile_init %pS versatile_init+0x0/0x110
%pSR versatile_init+0x9/0x110
(with __builtin_extract_return_addr() translation)
%ps versatile_init
%pB prev_fn_of_versatile_init+0x88/0x88
For printing symbols and function pointers. The 'S' and 's' specifiers result in the symbol name with ('S') or without ('s') offsets. Where this is used on a kernel without KALLSYMS - the symbol address is printed instead. The 'B' specifier results in the symbol name with offsets and should be used when printing stack backtraces. The specifier takes into consideration the effect of compiler optimisations which may occur when tail-call's are used and marked with the noreturn GCC attribute. On ia64, ppc64 and parisc64 architectures function pointers are actually function descriptors which must first be resolved. The 'F' and 'f' specifiers perform this resolution and then provide the same functionality as the 'S' and 's' specifiers.
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值